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authorEric W. Biederman <ebiederm@xmission.com>2012-11-16 03:03:12 +0000
committerDavid S. Miller <davem@davemloft.net>2012-11-18 20:33:37 -0500
commit3594698a1fb8e5ae60a92c72ce9ca280256939a7 (patch)
tree54360b8a85136ebfeb10f76cfa207a23fb6035e9 /net/ipv4
parentb51642f6d77b131dc85d1d71029c3cbb5b07c262 (diff)
net: Make CAP_NET_BIND_SERVICE per user namespace
Allow privileged users in any user namespace to bind to privileged sockets in network namespaces they control. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/af_inet.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 4f5f22061e1..24b384b7903 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -474,6 +474,7 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
struct sock *sk = sock->sk;
struct inet_sock *inet = inet_sk(sk);
+ struct net *net = sock_net(sk);
unsigned short snum;
int chk_addr_ret;
int err;
@@ -497,7 +498,7 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
goto out;
}
- chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
+ chk_addr_ret = inet_addr_type(net, addr->sin_addr.s_addr);
/* Not specified by any standard per-se, however it breaks too
* many applications when removed. It is unfortunate since
@@ -517,7 +518,8 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
snum = ntohs(addr->sin_port);
err = -EACCES;
- if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
+ if (snum && snum < PROT_SOCK &&
+ !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
goto out;
/* We keep a pair of addresses. rcv_saddr is the one